Muriel Bielenberg is a German voice actor known for her work in the German dub of Japanese anime series. Her career in anime includes several prominent supporting and leading roles in major productions released in Germany during the late 2010s and 2020s. She has performed as part of the voice casts for a variety of genres, ranging from dark fantasy to action and romantic drama.

Bielenberg’s voice is known for portraying Tsukasa Taira, the female protagonist of the dark fantasy series Devils' Line. This role marked an early credit in her anime career, with the German dub produced at Studio Hamburg Synchron and released on home video by Universum Anime starting in March 2019. She later voiced the character Madoka in the animated film Over the Sky, a German dub produced by TNT Media in Potsdam under the dialogue direction of Patrick Keller. The German version of the film was released in cinemas across Germany, Austria, and Switzerland in September 2023.

In 2024, Bielenberg was featured in two high-profile anime simulcast productions. She provided the voice for Konomi Okonogi in the action series Kaiju No. 8, which premiered its German dubbed version on Crunchyroll in April 2024. The same year, she voiced Elfaria Albis Serfort, a significant character in the fantasy series Wistoria: Wand and Sword, in another German dub produced by TNT Media.

Throughout these projects, Bielenberg has frequently worked alongside the same group of German voice actors, including Rajko Geith, Tom Ferenc, and Emilia Raschewski, as well as directors such as Patrick Keller. Her notable achievement includes performing leading and supporting roles in several major anime licenses released for the German market, demonstrating her consistent presence in the industry's dubbing landscape of the early 2020s.